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X-ray Studies on Crystalline Complexes Involving Amino Acids and Peptides. XXVIII. Recurrence of Characteristic Aggregation and Interaction Patterns in the Crystal Structures of OL- and L-Lysine Formate

Stephen, Suresh and Vijayan, M (1995) X-ray Studies on Crystalline Complexes Involving Amino Acids and Peptides. XXVIII. Recurrence of Characteristic Aggregation and Interaction Patterns in the Crystal Structures of OL- and L-Lysine Formate. In: Acta Crystallographica, 51 (Sectio). pp. 353-358.

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Abstract

The crystal structures of L-lysine formate [P2j,a = 5.431 (1), b = 7.546 (1), c = 12.095 (2)A,/~ = 93.42 (1) °, Z = 2] and DL-lysine formate [P21/c,a = 10.205(2), b= 11.152 (2), c = 8.491 (1),~,,fl=97.51 (1) °, Z=4] have been determined and refined to R = 0.039 and 0.054 for 1060 and 1689 observed reflections, respectively. Both the structures consist of alternating layers of unlike molecules. The aggregation pattern in the lysine layer in the L-lysine complex, with a straight and a zigzag head-to-tail sequence interconnecting the molecules, is almost the same as that observed in L-lysine acetate, L-lysine L-aspartate and L-lysine D-aspartate. In the DL-lysine complex, hydrogen-bonded dimers of lysine are inter- connected by head-to-tail sequences, as in DL-lysine hydrochloride. The structures thus demonstrate the relative invariance of certain aggregation and interaction patterns involving lysine. The relative invariance also extends to interactions between the side-chain amino group and the formate ions.

Item Type: Journal Article
Additional Information: The copyright belongs to International Union of Crystallography
Keywords: Crystalline Complexes;x ray structure;l lysine formate;amino acid;peptides
Department/Centre: Division of Biological Sciences > Molecular Biophysics Unit
Date Deposited: 26 Jul 2004
Last Modified: 05 Apr 2011 08:35
URI: http://eprints.iisc.ernet.in/id/eprint/1181

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